Sanding machine



NM. 7, 1933. E, NELSON 1,934,555

SANDING MACHINE Filed Sept. 9, 1932 3 Sheets-Sheet l Inventor flr/zarZ/Veis an A. E. NELSON SANDING MACHINE Nov. 7, 1933.

Filed Sept. 9, 1932 3 Sheets-Sheet 2 Invenlor Ar/% wrZ/IZsan A. E. NELSON 1,934,555

SANDING MACHINE Filed Sept. 9, 1932 3 Sheets-Sheet 3 fl llorne y Patented Nov. 7, 1933 UNITED- STATES PATENT OFFICE Application September 9, 1932 Serial No. 632,429

5 Claims. 7 (01. 51-176) This invention appertains to new and useful improvements in the general art of abrading and more particularly to a machine for abrading floors and other like surfaces.

- The principal object of the present invention is to provide asanding machinefor heavy duty use which because of its simple and compact constructioncan be readily-carriedfrom place to place without difiiculty. 7

Another important object of the invention is to provide a sanding machine wherein the abrading element can be disengaged from the work while in operation in an easy and convenient manner. I

These and various other important objects and advantages of the invention will become apparent to the reader of the following specification.

In the drawings:

Figure 1 represents a side elevational view of the novel machine.

Figure'2 represents an end elevational view of the machine. 7

Figure 3 represents a sectional view taken substantially on line 3-3 of Figure 2.

Figure 4 is a fragmentary sectional view taken substantially on line 4-4 of Figure 2.

Figure 5 represents a perspective view of the caster.

Figure 6 represents a fragmentary top plan view showing the means for retaining the handle.

Figure '7 is a sectional view taken substantially on line '77 of Figure 6.

Referring to the drawings wherein like numerals designate like parts, it can be seen that in Figures 2 and 5, numeral 5 generally refers to the caster mount which also supports the motor assembly. This consists of an elongated bar 6 having an upstanding plate '7 .at the intermediate portion thereof and offset from the longitudinal axis thereof. The intermediate portion of the bar 6 is provided with an offset reduced portion 8 for accommodating the shaft 9 in a manner substantially shown in Figure 2. Each end of the bar 6 is provided with a pair of depending ears 10-10 between which the caster wheel 11 is mounted.

It can be seen in Figure 3 as well as in Figure 2, that the plate '7 is provided with vertically extending slots 12 through which clamp screw 13 can be disposed for engagement into the vertically adjustable plate 14. This plate 14 is provided with internally threaded ears 15-15 through which set screws 16 are disposed for engagement against the bar 6. Obviously by adjusting the screws 16 pursuant to the loosening of the clamp screws 13, the plate 14 can be adjusted vertically to the desired extent in relation to the bar 6.

Oneend of the plate 14 is provided with an upstanding ear 1'7, while the motor platform 18 is provided with a depending ear 19 and a pivot pin 20 extends through these ears for swingably supporting the platform 18-at one end. The bottom of the opposite end portion of the platform 18. is recessed to receive the upper end of the coiled compressible spring 21. The lower end of this spring 21 is seated in a socket 22 in the underlying end portion of the plate 14. The spring 21 obviously absorbs vibration emanating from the motor 23 which is secured in any suit- 7Q able manner on the platform 18. A safety chain 1 24 extends from an eye 2.5 on the platform 18 to a member 26 on the plate 14 and acts as a safety element to permitswinging of the platform 18 toward the left in an upward direction.

Upon the motor 23 is a clamp 27 forming a handle and secured to the edge of a hinge plate 28. A yoke 29 is hingedly connected as at 30 to the hinge plate 28 and this yoke can engage the handle 31 which is secured at its lower end to the collar 32 on the forementioned shaft 9. A thrust collar 33 is provided on the shaft 9 to limit the movement of the collar 32 in an inward direction, while a collar 34 is provided on the outer end of the shaft beyond the handle 31 to prevent thrust of the collar 32 in the opposite direction. The collar 34 is provided with depending diverged leg members 35-35 as clearly shown in Figure 2 and each of these legs is provided with an inwardly disposed lug 36 against which the handle member 31 can abut as in the dotted line position shown in Figure 2, the handle bar 31 being provided with a protuberance which engages the lug 36.

The armature shaft 38 of the motor 23 is provided with a pulley 39 driving a belt 40 which is trained over the pulley 41. This pulley 41 is on a collar 42 which is secured to the barrel 43 rotatably mounted on the aforementioned shaft 9. .100

An important feature of the invention is in the balancing of the motor mount so that normally the abrading element will rest upon the floor in the manner substantially as shown in Fig. 1, by a slight overhalancing of the motor in that direction.

By swinging the handle and motor mount toward the left in Fig. 1, the motor mount will have its support distributed to the legs 35 and in this position although the sanding element may be operating, the same will be removed from the work surface.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having thus described my invention, what I claim as new is:

1. An abrading machine of the character described comprising a wheel mount, a motor mount, a motor on the mount, adjustable means between the wheel mount and the motor mount, a shaft journalled through the motor mount, an abrading element on one end of the shaft, and a leg depending from the opposite end of the shaft for supporting part of the weight of the motor when the abrading element is tilted upwardly.

2. An abrading machine comprising a wheel mount, a motor mount, adjustable means between the motor mount and the wheel mount, a shaft journalled through the motor mount, an abradingelement on one end of the shaft, a drive between the motor and the abrading element, and a laterally disposed handle on the opposite end of the shaft.

3. An abrading machine comprising a wheel mount, a motor mount, adjustable means between the motor mount and the wheel mount, a shaft journalled through the motor mount, an abrading element on one end of the shaft, a drive between the motor and the abrading element, and a laterally disposed handle on the opposite end of the shaft, said handle being swingable circumferentially on the said shaft.

4. An abrading machine comprising a wheel mount, a motor mount, adjustable means between the motor mount and the wheel mount, a shaft journalled through the motor mount, an abrading element on one end of the shaft, a drive between the motor and the abrading element, and a laterally disposed handle on the opposite end-of the shaft, and a leg member depending from the last mentioned end of the shaft.

5. An abrading machine comprising a wheel mount, a motor mount, adjustable means between the motor mount and the wheel mount, a shaft journalled through the motor mount, an abrading element on one end of the shaft, a drive between the motor and the abrading element, and a laterally disposed handle on the opposite end of the shaft, said handle being swingable circumferentially on the said shaft, and a swingable yoke member on the motor for engaging and retaining stationary the said handle.

ARTHUR E. NELSON. 

